Ghosts for a Front Entry - plastic bowls with drilled holes in the bottom, turned up-side-down and threaded to the ceiling secured with duck tape; and use cheese cloth or white fabric with felt faces secured to them :D
Orange-o-lanterns! (No link, just wanted to remind myself of the idea). Cut the top of the orange, hollow out (be sure to not cut lining too thin or it'll melt your candy). Make faces for the oranges and fill up with goodies!
Les masques du Carnaval: le masque de chauve-souris